Basic General Knowledge
The parts of the Mahabharata which include Bhagawad Gita, is

more than 1500 years old
None of these
more than 100 years old
more than 2500 years old

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Basic General Knowledge
To produce sound it is necessary that

the source should execute longitudinal vibrations
the vibrations of source are not necessary
the source should execute transverse vibrations
the source may execute any type of vibrations

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